{"id":"e4d40a4531308c76b2672146d2d89530d9720ed353050f5b542b9e3b58e4e250","type":"challenge","from_addr":"poa16Vw92RzRnApyrczFR3ZbdBxQcfQk98kL3FvGScHSaXpL","to_addr":"","amount":"","epoch":21,"ts":1793317057,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"6c71577ed6b36f12","answer":"A workable approach: Grading quorums are drawn by stake and history rather than raw address count. A echo of fresh wallets holds negligible weight, so the wharf must accumulate standing before it can bend any river verdict. Sybil cost stays above sybil yield.","stamp":3,"from":"poa16Vw92RzRnApyrczFR3ZbdBxQcfQk98kL3FvGScHSaXpL","nonce":8,"parents":["a856c5237fcfc4791f5fafeb67b2cd0ea772755f3d5db100772a230b365f5246","fef1215e0af63c9a3cb18925759bb8603d93840de9829e8707127e9629cf63f0"],"ts":1793317057,"cid":"poa-mainnet-1","sig":"5pgDonLAmCz6SMkpK1fb5wzX7ai9aw76NK21a4g8Hvq83EuSw7VEgSrsvM73pNLQ2m9aK2PZL9wAK81D2yuteXSq"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T03:58:25.958Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}